Paper-feeding machine.



lE. o. DEXEEE E E. E. JONES.

APER PEEDING MACHINE.

APPLICATION FILED 06T. 2B, 1910.

Patented Apr. 9,111,912.

.wwwa-wao:

T. G. DEXTER & R. E. JONES.

' PAPER FEEDING MGHINE. APPLIQATION rILBn/oomwza, 1910.

1 ,022,776.' Patented Apr. 9, 1912.

4 SHEETS-SHEET 4.-

unimi) surmise PATENT onirica.

TALBOT c. 'DEXTER AND Bierman ii. JONES, or PEARL aivna, iviiw YORK,.assieivons TO DEXTER FOLDER COMPANY, 0F PEARL RIVER, NEW'YORK, ACORPQRATlON OF NEW YORK.

PAPER-FEEDING MACHINE.

Specification of Letters Patent.

.ilpplcatioaled 0ctober`28, 1910. Serial No. 589,543.

Patent-euhm?. 9, 1912.

To allv whom t am@ concern Be it known that We, TALBOT` C. DEXTER andRICHARD E. JONES, hoth citizens'ofthe United States, and residents ofPearl River,

county .of Rockland, State ofv New York, have invented certain nevi7and'usefullni- 'proveinents iig Paper-Feeding Machines, of which thefollowing is a specification.

The present invention relates to improvements in thev type of pilefeeding machines in W iich there are main and auxiliary pile elevatingmechanisms arranged to act independentlyV for supporting and elevatingpiles of sheets for the purpose ot providing means for building up a ileupon one table or platform While theg eeding machine is opeiating` upona pile supported by another table or platform. Several forms of thistype of machine have been developed, in

some of which there is an independentstationary supfport for a tableAor, platform at the base o the machine upon 'which' the sheets may bepiled While the machine is operating, While in others the arrangement issuch that the sheets are piled upon a table or platform resting uponthe" elevating frame of one of the elevating mechanisms, While themachine is operating upon. the pile under the, control oi' the otherelevating mechanism. j

The present improvements are applicable to either` of these forms ofthistype of niachine, although we have obtained the most satisfactoryresults and greater simplicity in applying our improvements to the forni,of machine in which the pile is loaded upon Aa table or platformsupported by one elevating mechanism While the machine iis operatingupon a pile sustained by the other elevating mechanism.

In the development of our improved ,man

chine, we have so modified the old and wel] known construction .of pilefeeding niachines that the machine may be operated either upon the oldplan as a single table machine or upon the 'new plan as a double tablemachine. Vile retainin our improved machine, the main pile elevator. ofthe old and well 'knoivn construction comprising ltwo verticallyarranged elevating screws operated by automatically controlled `mech`anisnn'and a vertically traveling girder frame threaded upon ,saidscrews Iand arranged to supporta` sectional table or-platiiorin'j'uponwhich? the pile ot sheets visumranged. iThis main elevating mechanismhas been effectively modiiied to have combined with it an auxiliary pileelevating mechanism which is actuated by the saine general operatingmechanism controlled by suitable devices which enable the operator tooperate the main and auxiliary elevating mechanisms independently ofeach other or simultaneously. The operation of both the main andauxiliary elevating mechanisms is under the automatic control of thepile g'overnor Whether the s'aid mechanisms are operating independentlyToi' together. i

In the specific embodiment olfour invens tion disclosed in the presentapplication, we have reduced the diameter' of the upper-ends of the mainelevating screws and have freelyy journaled upon these reduced ends'auxiliary feed screws in the .torm of threaded sleeves. The upper endsof these auxiliary feed screws or sleeves are suitably geared to anauxiliary pavvl and ratchet driving mechanism, the oscillating` pavvloi' `which isl actuated from the same mechanism which actuates theoscillating paivl of the main elevating screws. Independent auxiliarytraveling yoltes are suitably mounted in .the-machine frame alcove thetraveling frame oi" the main elevating mechanism and these auxiliaryyokes are threaded upon the auxiliary elevating screivs or sleeves.Suitable hangers are carried by said yokes and means are provided forengaging said hangers with a pile'supporting table or platform.

An automatic pile governor controls the operation of the elevatingmechanisms to suit the variations in the height of the pile ,of `sheetsbeing operated upon.

rl`he oscillating pawl of the main elevating mechanism is arranged to beautomatically thrown into and out of action hy a manually operatedreversing mechanism by which the main pile elevator may he run up ordown by power. The actuating pawl for the auX- iliary elevatingmechanism is manually thrown into and out of action.` VVith thisarrangement, it will be understood that the machine can be operatedunder the old plan by using only the main pile elevatingmech- 4 anisin,or upon the new plan by usingboth elevating mechanisms. It Will tui-therhe understood that in starting worlr with.

lthe feeding machine under the* dduble table plan of feed, ,the initialpile isv supported, upon thenmain elevating plate or platform of theinitial pile being at the the purpose of providing a vertical guide 4upa new pile of sheets upon a second table rings, and afterward point outthe novelty more particularly in the annexed claims.

I tion of a paper feeding machine embodying bar or girder 3. ,'lhesemain frame parts form, the auxiliary elevating mechanisml being thrownout of operation.` Thefy -nlahine will operate under the automaticcontrol of the pile governor until the Q main elevating platform hasreached an elevation within the range of the auxiliary elevatingmechanism. At this point in the operation, without arresting the feedingop eration of the machine, the auxiliary pile elevating mechanism'isplaced in operation by engaging the hangers withthe pile supportingplatform and throwing the'aux-A iliary oscillating pawl into engagementwith its ratchet. The power mechanism is then thrown into gear with themain elevating mechanism and the main .pile supporting platform israpidly lowered to the bottom of the machine, the remainder of theinitial pile being in the meantime automatically elevated by theauxiliary mechanism, while the feeding machine continues to operate.1While the machine is feeding ofi' thel latter part ofthe initial pile,the operator builds or platform which is put in position on the mainelevating frame at the base of the machine. When the entirev pile iscompletely exhausted, the second pile is quickly elevated by power tothe proper height for the operation of the feeding devices, the tablesame time removed from the hangers of the auxiliaryv elevating mechanismto make way fm the second pile of sheets.

.n order that our invention may be fully understood, we will firstdescribe the same with reference to the accompanying draw- In saiddrawings Figure lv is a side elevaour improyements. Fig. 2 is aVvertical transverse sectional elevation of the Fig. 3 is a plan view ofthe same. Fig. 4 is a detail side elevation of the reversible gearingfor the power operation of the main pile elevator, and Fig. 5 is anenlarged detail vertical sectional view of parts of the main andauxiliary elevating mechanisms.

Paper `feeding machines of the type to which our present improvementsapply are usually constructed with heavy frames such as illustratedin"the accompanying drawings, in which the main frame consists of theupright side frames 1, the transverse top bar or girder 2, and thetransverse bottom are properly secured together and braced by the usualtie bolts in the manner well understood in 'this art. vThe machine isprovided at the front with a series of vertical bars or slats 11indicated in dotted lines in Fig. 1 for for the front edge of the pileof sheets.

Each of the side frames 1 is formed with a main channeled uprightstandard 5 in which are located the main and auxiliary elevating screwsand 'in which travel the threaded boxes of the main and auxiliaryelevating frames. The main elevating screws are shown at G journaled attheir lower ends in suit-able bearings 7 supported upon t-he bottomgirder 3 and adjacent to their upper ends in bearings 8 suitably securedto the machine side frames. The extreme upper end of each main elevatingscrew (5 has keyed to it a bevel gear 9 meshing with a similar bevelgear 10 keyed to a ltransverse shaft 11 suitably journaled in themachine frame beneath the top girder frame or bar 2. This shaft ll'isdriven in either direction by a motoi for the rapid raising andloweringof the pile supporting platforms, or is driven in a pile elevatingdirection by a pawl and ratchet mechanism operated from the cam shaft ofthe feeding machine for gradually elevating a pile to suitl therequirements of the feeding machine. These mechanisms for driving theshaft 11 will now be described.

The shaft 11 is extended at each side of the machine beyond'the verticalplanes of the'elevating screws G. One end of shaft 11 has keyed to it alarge gear 15 driven by' a reversible train of gear operating from amotor driven shaft. 16 is a motor driven shaft journaled in bearings 17extending up from the top bar 2 and having at one end a gear 18 which isdesigned to mesh with and be driven `by the driving pinion of a motorwhich is mounted upon the top beam 2 of the machine frame. This motor isnot shown in the accompanying drawings. vThe opposite end of the shaft16 has keyed to it a pinion 2O which meshes with. and drives anintermediate gear 2l journaled upon astud carried by a .rockingcontrolling lever 22 which is `ournaled upon the extension' of the motordriven shaft 16k The gear 21 meshes with and drives a smaller gear 23also journaled upon a stud carried by the controlling lever By shiftingthe lever 22 upon shaft 16 either the gear 21 or the gear 23 can bethrown into mesh with the large gear 15y upon shaft 11 -so that the'shaft 11 will be rotated in either direction depending upon which .ofthe gears 21 and23 is thrown into operation. The controlling lever 22has an arm 22 projecting from it to which is pivoted at 25 the upper endof a rod or link 2G pivoted at 27 to a hand lever 28 journaled upon oneof the side frames of the machine at 29. r1`his hand lever 28 is formedwith a slotted curved segment 30 through the slot of which v extends ahand screw 31 threaded into an lopening in the,

machine frame. By loosening the screw 31 it will be observed that thelever 28 caribe placed in either of, its extreme positions, or in itsintermediate position and that it Tcan be clamped in either ofthesethree positions by means of the screw 31. In one of the extremepositions, the intermediate gear 21 vwill be in 4mesh with gear 15 fordriving matica'llyfcontrolled pawl and ratchet mechproer height forfeed? anism to gradually elevate the pile of sheets and maintain the.,top of .the pile at the fithe action of the sheet ing devices.

The opposite extension of the shaft 1 1 has keyed to 'it a -smallratchet wheel 35. Journaled upon the endl 'of shaft 114` adjacent to theratchet wheel is a rockin arm or lever 36 to the upper end of which 1svpivoted at 37 a awl 38-whichis adapted toen ge the ratc et wheel 35 andvrotate the sha t l1 `in a step by step mannen. The lower endof therocking lever 36 carries -a laterally projecting stud 39 lwhichoperatesin the elongated slot 40 of .a reciprocating pitman 41 pivotedupon'the crank pin V42 of the'disk cam 43 which iskeye'd'to the main camshaft 45`ofthef aper; `feeding machine.

' The fee ingdevices of the machine are not shown, butin the Dextertypeofpaper feeding machine. to which the present improvements areillustrated as applied, al-lof the operative parts 'of the machine are i,driven by this cam shaft v45.

It will be observed that the slot 40 the pitman 41 is formed atits innerend with an -upwardlygpifesented off-set or recess 40a in which the stud39 engages at one end of the stroke; of the pitm'an, for the purpose ofreturning thepawl carrying lever 36 and pawl 3.8 after a feeding stroke,unlessl its return movement is prevented by the pile 4governor'whichwill now be explained.y

Pivotally connectcdfto the dowcr end of `the paWl-carrying lever 36 is ahorizontalthe machine frame-for 1n its reciprocating movements.

link 50 formed with yan elongated slot 51 ,i0 intowhich projects `apin'52extcnding from guiding the link 50 This link 50 is formed in itsupper edge with a notch 5.3 which is adaptedto be engagedby agravityretaining lpawl or dog 54;*after' a feeding stroke of the pawl38. This: pawl or dog 54' is freelypivoted'upon a pin '55 projectingfrom the machine frame.I

is a rock sha-ft suitably journaled in the-machine frame and carrying arock arm 61 formed.Witlfi'a` laterally projecting stud f 62 whichispresente'd beneath the retaining pawlforv dog v`54. l Therock shaft 60also carries a rock arm '63 provided with antiwhich is j ournaledcontactwith the cam 43, so that once iii each revolution of the camshaft 45, the rock shaft 60 will be moved for vraising the retaining dogor pawl 54.

J ournaled in the lower end of a depending bracket -arm is a short rockshaft 71 carryingrock arm 72 in the free end of a pile gaging roller 73.This rock shaft 71 also carries an arin- 74 which is connected by a rod75 with the short arm 76 projecting from the rock shaft 61 forcontrolling the movements of said rock shaft`61 from the varyingelevation of the top of the pile of sheets.

From this construction of pile governor, it will be observed that in thenormal operation of the machine, the rearward motion of pitman- 41 rockslever 36 causing pawl 38 lto rotate shaft 11 forwardly one step. At thecompletion of this feeding stroke, the low part of. the controlling cam43 is presented beneath the controlling arm 63 with the result that thepile gaging roller-7 3 will be 'dropped to `the top of the pile ofsheets being operated upon. If the elevation of the top .of the pile isbelow normal, the gaging lever will drop low enough to permit, rock arm61 to elevate the retaining dog or pawl 54 vout of the path of notch k53so that the return movement of pitman 41 will return the lever36 vandpawl 38 for a new feeding stroke. If, however, at the moment of gagingthe elevation of the pile of sheets, the elevation `is normal, thegaging roller 7 3 will not-'drop low enough to cause the elevation ofthe retaining dog or pawl 54, and as the pitman 41 starts its returnstroke. the;

Lpawl or dog 54 will engage the notch 53 andretain the lever 36 and pawl38 in their inactive positions, the return movement of the pitman 41disengaging the' notch 40n from stud 39 land allowing the stud 39 toride in the extension' slot 40. AThe lever 36 and pawl 38 are retainedin their inactive positions until -suticientxsheets are. moved from thepile to lower the top below normal, each stroke of pitm'an 41 serving toautomatically free the engagement of dog-or pawl 54 from thc notch oflink 50 to vpermit the raising of the dog or pawl 54 from the path ofthe notch in the event of the top of the pile falling low enough torequire another elevating stroke.

It will be observed particularly from Fig. 1 of the drawings, that thepawl 38 is formed with a curved controlling finger 38 beneath whichengages a stud 8O carried by rock arm 81 secured to the end of acontrolling shaft 82 which ext-ends from side to side ofthe machine andhas upon "its opposite end the oppositely arranged roc-ker arms83 and84, each of which is provided. withan anti-friction roller 85.Thelrpcking .lever 22carryjing the motor driven reversing gears isprovided with two inwardly Y 'projecting lugs 80 and 8T, the former ofwhich is presented in the path of the anti.- friction roller carried byrock arm 83, while the latter of which is presented in the pat-h of andon the opposite side of the roller carried by the rock arm S-t, so thatwhen the gear carrying lever 22 is shifted into one extreme position tothrow gear 21 into mesh with driven gear l5, the lug 87 will engage theanti-friction roller upon lrock arm 84 for rocking shaft 82 and causingthe stud S0 to engage the arm .38 and raise the pawl 38 out ofengagement with the ratchet wheel 35. When on the other hand, thegear-carrying lever 22 is shifted to its other extreme position forthrowing gear 23 into mesh with driven gear 15, the lug 8G will engagethe anti-friction roller of arm 83 for rocking shaftvSZ in the samedirection with the same result. It is necessary to' maintain l the pawl38 out of engagement with the ratchet wheel when the shaftll is drivenby the motor for either rapidly raising or lowering the pile supportingplatform. It will vbe observed with particular reference to Fig. 4 of'the drawings `that when the gear-carrying lever 22 is in itsintermediate position, neither of the lugs S6 nor 8( will engage arocker arm upon shaft 82, so that pawl 38 will naturally gravitate in`engagement with the ratchet wheel 35 and this intermediate position ofthe gear-carrying lever 22 must be maintained while the pile elevatingmechanism is being operated by the automatically ,controlled pawl andratchet devices.

The pile support of the main elevating mechanism is shown in the form of'agirder frame comprising the end girders 90 and the connected sidegirders 91 formed into a stout rectangular supporting frame. The endYgirders 90 have secured to them the nuts or boxes 92 which are threadedupon the main elevating screws (i and arranged to travel in the verticalchannels of the stand ards 5 in the usual manner. The sectional platformboards are shown at 95 with the positioning cleats 9.0 to enable the`perator to quickly place the platform boards in po sition to receive apile of sheets. P indi- Vcalles a pile of sheets upon the platform.

The upper ends of the main elevating screws (5 are turned down to areduced diameter as shown particularly in Fig. 5 of the drawings, toreceive the screw sleeves of the auxiliary feeding mechanism. auxiliaryscrew sleeves .are indicated at 100.

The sleeves 100 are of tubular form and vatingA `screws rand theauxiliary screw rhese extent between the ends of the screw sleeves so asto provide vertical bearings 102 for the sleeves at their ends and thereduced section 103 between the bearings.

Each screw sleeve 100 h'as secured to its upper end a pinion 105 whichmeshes with alarger gear 106 driven by a pinion 107 secured to a shortvertical shaft 108 carrying at its upper end a bevel gear 109 meshingwith a bevel gear 110 keyed to a transverse shaft 111. same mannertoboth of the screw sleeves 100.

Keyed toan extended end of the shaft 111 is a ratchet wheel 112 andjournaled upon the shaft 111 is a rocker arm 113 to which weightedthrow-out handle 112". The rocker arm 113 may have a weighted portion asshown at`113a to assist 'the return action of the pawl-carrying arm. Therocker arm 113 has pivotally connected to it at 115 a link 116 which ispivotally connected with the lower end of the pawl-carrying lever 36above described, so that the movements ofthe lever 36 are transferred tothe rocker arm 113. l

Threaded upon the auxiliary screw sleeves 100 `arethe nuts or boxes 120which are arranged to travel in the lupper portions of the channels ofstandards 5. These nuts or lugs 125 in which are adjustably mountedstout steel rods 126 held in the desired adjusted position by set screws12'? passing through the walls of the lugs 125 and engaging the rods126. Each of the rods or bars126 is provided with two depending hangerarms 130. 'These hanger arms 130 are adjustably mounted adjacent to theopposite ends 'of the rods or bars .126 land are secured in the desiredadjusted positions by set screws such as shown at* 1.31. Each hanger armis formed at its lower end Iwith a. yoke 'or saddle 132 and a pin 133extend ing between the arms of the yoke or saddle.

Heavy rods orbars 140 are secured ben eath the platform boards 95adjacent to the ends of the boards. Any suitable means may be providedfor attaching these bars 140 to the platform boards,such for instance,as the metal .loops or straps 141. The rods or bars-msj? be attached tosingle large platform boardside to certain sections of a sectionalboard.

Itwill be observed that the ends of the j adjacent to the inner faces ofthe side frame of the machine in position to engage and be supported bythe pins 133 in the yoked ends of hanger arms 130.`- v

From the above description, it will be observed that tlie step by stepfeed of both the sleeves, the screws 6 are reduced to a greater Theshaft 111 is geared in the" rods or bars 140 project laterally `topoints' main and auxiliary pile elevating mechais pivoted at 114 a pawl112a having a l boxes 120 have inwardly projecting heavy main pawl 38 isthrown out of engagement:

with its ratchet wheel. illhenfthe main ele-- rating mechanism is beingoperated by motor, the auxiliary mechanism may be in action.

ln addition to the automaticv operation of both elevatingmechanisms, andthe motor driven operation of' the main elevating vmechanism, it will ofcourse be understood that both of these elevating mechanisms may beoperated and adjusted by hand. In Fig. 3 We have illustrated aremovablecrank handle 150 upon'the shaft ll of the main elevating mechanism, anda removable crank handle 155 upon the shaft lll of the auxiliaryelevating. mechanism. These crank handles operate in the usual way andbythem the pile supports of both mechanisms may be raised or lowered tosuit the var ing requirements.

vhe'operation of the' machine maybe de'- scribed asy follows: Instarting a joh upon, the feeding machine equipped with our improvements,a pile of sheets is placedupon the supportingnframe of the mainelevating mechanism as 'in`theordinary feeding machine, and sheets arefed from the pile while the table is automatically elevated to suit therequirements ofthe machine, until the pile'is nearly exhausted.,A Whenthe pile is nearly exhausted, the main pile support will he near theupper end of its travel, and the platformk boards will be within rangeof the hanger arms of the auxiliary elevating mechanism.. At this pointin the operation, while the` feeding machine continues to operate, thehanger arms 130 are thrown over into enga ement with the bars 14.0secured beneath the platform, and the partsrigidly clamped engagedposition, it being understood that it 1s a simple matter to adjust theposition of the hangers to any lrequired elevationby theoperation of theauxiliary elevating mechanism by hand. As soon as the pile is underthecontrol of the auxiliary elevating mechanism, the operator throws themain elevating mechanism into gear with the motor and rapidly returnsthe pile support of the main eleva-ting mechanism to its initialposition atthe base of the machine 'where a new set of platform boardsis put in position and a new pile loaded thereon. The feeder willcontinue to operate from the remainder of the initial pile carried bythe auxiliary elevating mechanism, until it is entirely exhausted, whenthe feeding n'lachine is momentarily .stopped to remove the platformboards of the exhausted pilefand shift the hanger arms back out of thewayand elevate the new pile either by hand operation or by the action ofthe mot-or to bring the top of the, new pile at the proper elevation forthe continuance of the operation of the feeding machine. The operationisv then repeated as above described.

' 'A valuable feat-ure of our present improvements is the arrangementwhereby the machine may he operated with one o-rfboth of the pileelevating mechanisms,'so that if the operator prefers to run his machineupon the plan of the Iold form of feeders haring asingle pile elevatingmechanism,

he can do so. vThe addition of the auxiliary feeding mechanism does notalter th operation or usefulness of the main feeding mechanism of themachine, and even though equipped with the auxiliary feeding mechanism,a pile can be fed from start to finish upon the main feeding mechanismwithout using the auxiliary` mechanism.-l

What we claim is: y

l. ln a paper feeding machine, the combination of a frame, the main andauxiliary pile elevating mechanisms, including coupled pawl and, ratchetmechanisms, a pile governor controlling the operation of said coupledpawl and ratchet mechanisms, and

means for independently .throwing saidV pawl land ratchet mechanismsintoand out of operation'.

2. ln a paper feeding machine, the combination of a frame, .the main andauxiliary pile elevating mechanisms, automatically -Controlled means for.operating said main and auxiliary mechanisms, independent means forthrowing said elevating mechanisms into and out of operation, and anindependent power driven mechanism for operatingsaid main elevatingmechanism.

3. .ln a paper feeding machine, the combination of a frame, the main andauxiliary Vpile elevating mechanisms, automatically controlled meansforV operating said main and auxiliary mechanisms, independent means forthrowing said elevating mechanisms into and outl of operation, anindependent power driven mechanism for operating said main elevatingmechanism, and4 manually controlled means for connecting said powerdriven mechanism with said mainelevating mechanism.

.4. In a paperv feeding machine, the combination of a frame, the mainand auxiliary pile elevating mechanisms, automatically controlled meansfor operating said main and auxiliary' mechanisms, independent means forvthrowing said elevating mechanisms into and out of operation, anindependent power driven mechanismfor operating said main elevatingmechanism, and manually controlled reversinggears adapted to connectsaid power driven mechanism vwith said main elevating mechanism for.

rapidly operating it in either direction.

5. In a paper feeding machine, the combination of a frame, the main andvauxiliary pile elevating mechanisms, automatically controlled means foroperating said main and auxiliary 4 mechanisms, independent means forthrowing said elevating mechanisms into and out of operation, anindependent power driven mechanism for op erating said main elevatingmechanism, manually controlled means for connecting said power drivenmechanism with said mainelevating mechanism, and means actuated by saidmanually controlled means for disconnecting said main elevating mech.-anism from said`automatically controlled operating means. 6. In a paperfeeding machine, the combination of a fra-ine, the main and auxiliarypile elevating mechanisms, a pawl and ratchet mechanism for each of saidelevating mechanisms, means connecting the operating pawls of saidmechanisms for actuating them in unison, independent means for Athrowing said pawl and ratchet mechanisms into and outof action, and apile governor controlling the operation of 4both of said pawl andratchet mechanisms.

7 In a paper feeding machine, the combination of a frame, the main andauxiliary pile elevating mechanisms, a pawl, and ratchet mechanism foreach of said elevating -mechanisms, an independent power drivenmechanism for o eratiiw said main elevating mechanism, manuallycontrolledI reversing gears adapted to connect said power drivenmechanism with said mainelevating mechanism, means actuated by thecontrol of said reversing gears for disengaging the pawl from theratchet of the main elevating mechanism, and a, pile governorcontrolling the operation of both of said pawl and ratchet mechanisms.

8. In a paper feeding machine, the combination of a frame, with the mainand auxiliary pile elevating screws, mounted in axial alinement in saidframe, and the main and auxiliary elevating frames operatinguponsaid'screws.

9. In a paper feeding machine, the coinbination of a. frame,withthe'main elevating' screws, then pile supporting .frame threaded uponsaid main elevating screws, the auxiliary elevating screws arrangedabove and in axial alinement with said main elevating screws, anauxiliary pile elevating frame. threaded upon said auxiliary elevatingscrews, and means for operating the main and auxiliary screws.

10. In a paper feeding machine, the combination of a frame, with themain elevating screws, the pile supporting frame threaded upon said mainelevating screws, the auxiliary elevating screws arranged above and inaxial alinement with said main elevating screws, an auxiliary pileelevating frame threaded iipoii-said auxiliary elel vating screws,adjustable .means carried bysaid auxiliary `frame for engaging a pilesupporting table, and means for operating the main and auxiliary screws.

. 11. In a paper feeding machine, the coming screws, the pile supportingframe threaded upon said main elevating screws, the auxiliary elevatingscrews arranged above and in axial alinement with said main elevatingscrews, an auxiliary pile elevating frame threaded upon said auxiliaryele`` bination of a frame, with the main elevatvating screws, adjustablehangers depending l from said auxiliary frame, a pile support-ing tablehaving parts adapted to` be engaged by said hangers, and means foroperating-the main and auxiliary screws.

l2. In a paper feeding machine, the combination of a frame, with themain elevating screws journaled in said frame and having reduced upperends, the main pile elevating frame or platform threaded upon said main4elevating screws, the auxiliary screw sleeves ournaled upon the reducedends of the main n levating screws, an elevating frame thread- 4:d uponsaid auxiliary elevating screw tlceves, and means for operating saidmain elevating screws and auxiliaiy screw sleeves. t 13. In a paperfeeding machine, the combination of a frame, with the main elevatingscrews journaled in said frame, the main pile elevating frame .orplatform threaded upon saidinain elevating screws, the auxiliaryelevating screwsjournaled upon and in alinement with the main elevatingscrews,- an elevating frame threaded upon said auxiliary elevatingscrews,` adjustable means carried by said auxiliary elevatingframe for fuponsaid main elevatin-gscre'ws, the auxiliary elevating screws)ournaledjin said frame above the main elevating-screws, an auxil- "iaryelevating frame threaded vupon-,said

auxiliary elevating screws, bars mounted in v'said auxiliary frame,hangers depending from said bars, a pile su port-ing platform havingrods projecting om it, means of engagement between said hangers and saidrods, and means for operating the main and. auxiliary elevating screws.

15. In a paper feeding machine, the com- 'iso .the upper ends" of saidmain elevating f screws, screw sleeves journaledupon the ,geared to theuppdr ends of said main'ele- 'vatting screws, en auxiliary pileelevatingsaid auxiliary screws,` apile governor conv'trolling the operatingmechanisms of the,

bination with a suitable frame, the main elevating frame threa binationwith a suitable frame, the main elevating. screws journaled in saidframe, a main pile elevating frame threaded upon saidy main screws,l.operating mechanism va 7ing' screws,` auxiliary elevating screwslofnaled 1n said frame above said main eleframe threadeduponsaidauxiliary screws, auxillary operating 'mechanism geared to main andauxiliar screws, and independent devices for throwing said operatingmechanisins into and out of act-ion.

16. In a paper feeding machine, the comvating screwsjournaled in saidframe, aA main plle elevating frame three/ded u on Said' screws,operatlng mechanism geare to main elevating serews an auxiliary ileeleded upon 'sal screw sleeve, auxiliary operating mechanism geared tosald screw sle'eves,'bars mounted 1n said 'auxiliary frame, hangersdepending from said bars, a pile supporting'plattorm having rodsprojecting from it, and means oi.A

engagement between said hangers and said rods.

17. In a paper :feeding machine, the combination of a frame, the mainpile elevating mechanism mounted in said frame, an auxiliary elevatingmecli'anism mounted in said frame and including a traveling frame,hanger arms depending from said traveling frame andformed withyoke-shaped lower ends, pinsextending between the arms of l the yokes; apile supporting platform, and rods projecting from the pile supportingplatform into said yolres and supported by

